Wire-cutting die.



No. 69|,892. 1 Patented lan. 28, |902.

R. A. BREUL.

WIRE CUTTING DIE.

(Application led Sept. 11, 1901.)

(No model.)

%illlllilllllllllllm| @vH/mma l UNITED STTES PATENT CFFICE.

RICHARD A. BREUL, CF BRIDGEPORT, CONNECTICUT.

WIRE-CUTTING DIE.

SPECIFICATION forming part of Letters Patent No. 691,892, dated January28, 1902.

Application tiled September ll, 1901. Serial No. 75,089. (No model.)

T0 ctZ'Z whom it may concern: j

Be it known that I, RICHARD A. BREUL, a citizen of the United States,and a resident of Bridgeport, in the county of Fairfield and State ofConnecticut, have invented certain new and useful Improvements inVVire-Cutting Dies, of which the following is a specilication.

My invention relates to wire-cutting dies, such as are employed forseveriu g blanks from a continuous wil-ered, and is specially designedfor severing thin blanks used in the formation of furniture-nail headsand may be used separately for that purpose or in connection with anautomatic furniture-nail machine similar to that shown and described inmy Letters Patent No. 680,839.

Heretofore in the production of wire blau ks from which to formnail-heads considerable difficulty has been experienced in securingperfect blanks-that is, a blank which when cut will form a true diskshape, being suficiently round'and of uniform thickness. The majority ofblanks heretofore produced have usually been oblong in cross section andthicker on one edge than on the other. Therefore it has been dicult toform a true symmetrical nail-head therefrom, since the stock 'wasunevenly distributed.

It is therefore the object of my present invention to provide dies thatwill effectively cut serviceable blanks of uniform diameter anddischarge the same from the diesV in successive order. Further, toprovide a device which is durable and especially adapted for operatingupon large wire, the blanks from which when sliced olf form small disks,being thin in comparison with their circumference. I have thereforeprovided dies adapted to receive the forward end of the rod and havinghardened polished surfaces,which dies inclose the wire end in a mannerto prevent it from spreading in either direction as the force is appliedand insuring the blank as it is shaved 0E to retain the originaldiameter of the rod with smooth and unbroken surfaces, and, finally, toconvey the blank from the wire-feed against a stripping device, wherebyits ejectment is insured.

With the above objects in view my invention resides and consists in thenovel construction and combination of parts shown upon the accompanyingsheet of drawings, forming a part of this speciiication, upon whichsimilar characters of reference denote like or corresponding partsthroughout the several ig ures, and of which- Figure l shows asideelevation of my improved blank-cutting die complete. Fig. 2 is a planview of Fig. l, the punch being omitted. Fig. 3 is a side elevation ofthe punch and dies shown in Fig. l. Fig. 4 shows a side and edge viewseparately of a blank such as have heretofore been made, and Fig. 5shows a side and edge View of ablank such as are produced by my improveddevice.

Referring in detail to the characters of reference marked upon thedrawings, a and b represent dies, which are suitably secured togetherand in practice may be located upon the bed of an ordinary press. Thepunchpassage j between these dies may be made for dierent thicknesses ofpunch-plates, as may be required to produce a dierent thickness ofblanks. This adjustment of the dies is secured by the substitution ofvarious thicknesses of packing-plates m, as will be obvious from Fig. 2.c indicates a bracket secured to-said dies, extending to one side andsupporting a spring d. This spring is designed to normally rest upon aVpin e, which passes through a suitable hole in the bracket and die andis provided with a semicircular roughened or serrated end to engage thewire rod after it is fed in through the channel j', thus preventing anyreturn movement of the rod. In practice this rod is held in this mannerat all times except when the same is to be fed forward.

g represents a pu nch,which in practice may be secured to the head of apress or may be carried by a suitable movable part of an automaticmachine, and is th us provided with a vertical reciprocatingmovement-which raises and lowers the same to and from the dies Vbeforementioned. Secured within the side of this punch is provided a cutter h,the samebeing formed of a hardened polished piece of steel set into asuitable recess of the punch and secured by means of a screw Z. Thiscutter in practice fits into the way j of the die ct, reciprocatingtherein with the movement of the punch. The lower end of this cuttercontains a semicircular cutting-recess, as is clearly shown in Fig. l,which in practice engages the end of the rod and with the movement ofthe punch severs a blank from the said end and forces it down into thelower portion of said dient/here it engages the beveled end of astationary stripper k, secured in the die a in any suitable manner. ItWill be observed that the blank is then removed from the recess in thepunch and free to fall. (See Fig. 3.) On the side of the punch beforereferred to is fitted a pin l, as clearly appears in Figs. l and 3,which is so located that when the punch is in its raised position (seedotted lines, Fig. l) the same willengage the under side of the springin a manner to raise it off the friction-pin, thus leaving the wire freeto be fed forward. By rea- ,son of the foregoing construction it will beobvious that the blanks are closely confined within the finishedpunch-passages of the dies and tightly held within the slot of thecutter and are forced into a smooth, sufficiently-true, and desirableblank. The rod may be fed into these dies of course either automaticallyor by hand, as desired, and consequently I have omitted the illustrationof any special feeding device.

To a certain limit this present invention is also adaptable for use inautomatic machinery, such as illustrated in my patent aforesaid, as theblanks produced thereby will be of more service and accurate shape thanthose produced without the additional element of the unyielding,flattening, and end-squaring surfaces, all of which has actually beendemonstrated since application for such patent was made.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, is-

l. In a wire-blank-cutting device the combination with. suitable dieshaving a hole for the wire to be fed therein, of a punch-plate adaptedto operate in a suitable recess at a right angle to the wire-openingkbefore mentioned, a friction pin mounted in the die adapted to engagethe wire, a spring to en.

gage the pin and normally hold it against the wire, means carried by thepunch to engage the spring and raise it from the pin.

2. A wire-blank-cutting device comprising suitable closed dies with arectangular opening therethrough, a reciprocating cutter tted in saidopening, having a transverse semicircular recess in its lower edge,means to firmly hold the Wire during the cutting operation and a lugcontained on the punch-holder for automatically releasing the pressureon the wire with the upward movement of the punch.

3. In a wire-feeding device the combination With a punch carrying acutter, of dies to receive said cutter, a stripper in the bot tom lofsaid dies and in linewith the cutter and having a beveled end to engagea blank and deflect it sidewise as it is fed thereagainst in the cuttingmovement.

4. A wire-cutting-off die having a Wirechannel opening intoa punch-platepassage with two opposite parallel smoothed sides, adapted to forceagainst both ends of a wire blank during its removal from the Wire rod,and to confine its length to the limit of the thickness of thepunch-plate.

5. A wire-cutting die containing a wirechannel leading to an aperturewith parallel sides adjustable to various thicknesses of punch-platesand arranged to closely confine the thickness of a blank to the size ofthe punch-plate by flattening and smoothing the blank ends during thecutting-off process.

6. AWire-cuttingdie withapunch-aperture adjustable in the direction ofthe Wire-supply, a Wire-channel leading into and a punch-plate fittingsaid aperture, the latter containing parallel polished surfaces forforcing the end surfaces of the wire blanks during the cutting-offoperation, squaring and smoothing the forced end portions and foraccurately sizing the length thereof.

7. In a device for cutting thin blanks from a wire rod, a two-part dieforming an adjustable aperture with parallel sides for the passage of apunch-plate, a Wire-channel opening into one of these sides, incombination with means to firmly hold the Wire rod in its advancedposition during the cutting operation.

8. An adjustable wire-cutting die consisting of a wire-holding portionand a wire-stop portion, both parts forming a close-fittin g aperturefor the punch-plate, said aperture having opposite parallel polishedblank-forcing surfaces in combination with a friction-pin in thewire-channel, means to force such pin against the wire during thecutting operation and mechanism to remove the pressure from said pinduring the feeding of the wire rod.

9. A wire-cutting die, having in the lower part of one of itspunch-passage sides an inclined surface, arranged to engage the wireblank during the downward movement and to force it out of thepunch-recess and from the wire-channel.

Signed at Bridgeport, in the county of Fairfield and State ofConnecticut, this 10th day of September, A. D. 1901.

RICHARD A. BREUL.

Witnesses:

C. M. NEWMAN, E. S. NEWMAN.

IIO

